The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 1990
Filed:
Mar. 08, 1989
Applicant:
Inventors:
Shinsuke Takahashi, Yokohama, JP;
Teruji Sekozawa, Kawasaki, JP;
Motohisa Funabashi, Sagamihara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
123399 ; 123340 ;
Abstract
A novel engine control method is disclosed in which in order to dampen the longitudinal oscillation of a vehicle such as an automobile and to prevent the deterioration of the exhaust gas purification performance thereof, the longitudinal acceleration or the engine speed of the vehicle is detected, and the detected vehicle acceleration or engine speed, as the case may be, is differentiated. A signal with the phase of the differentiated value advanced by a specific value is produced and used to compensate for the fuel injection time or a target value of throttle opening degree.